untreated
adjective
un·treat·ed
ˌən-ˈtrē-təd 
: not treated
untreated wastewater
especially
: not improved or controlled medically
an untreated case of pneumonia
untreated diabetic patients
Examples of untreated in a Sentence
untreated wool
Recent Examples on the Web
Attorneys point to warnings from the National Commission on Correctional Health Care, a 2022 state audit and prior deaths at Las Colinas involving untreated withdrawal, including those of Elisa Serna in 2019 and Vianna Granillo in 2022.
—
Kelly Davis, San Diego Union-Tribune, 7 Jan. 2026
Made of untreated cedar, the house has a 3-inch entrance hole and interior dimensions ideal for these larger birds.
—Dallas Morning News, 6 Jan. 2026
Georgetown officials are asking people to avoid the water in San Gabriel and Blue Hole parks after more than 100,000 gallons of untreated sewage spilled into the South San Gabriel River following a break in the wastewater line.
—Claire Osborn, Austin American Statesman, 6 Jan. 2026
Advertisement Rusty Yates supported the defense throughout the trial, repeatedly stating that Andrea’s actions were the result of untreated mental illness rather than criminal intent.
—Isabella Wandermurem, Time, 6 Jan. 2026
See All Example Sentences for untreated
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Kelly Davis, San Diego Union-Tribune, 7 Jan. 2026
Made of untreated cedar, the house has a 3-inch entrance hole and interior dimensions ideal for these larger birds.
—Dallas Morning News, 6 Jan. 2026
Georgetown officials are asking people to avoid the water in San Gabriel and Blue Hole parks after more than 100,000 gallons of untreated sewage spilled into the South San Gabriel River following a break in the wastewater line.
—Claire Osborn, Austin American Statesman, 6 Jan. 2026
Advertisement Rusty Yates supported the defense throughout the trial, repeatedly stating that Andrea’s actions were the result of untreated mental illness rather than criminal intent.
—Isabella Wandermurem, Time, 6 Jan. 2026
See All Example Sentences for untreated
Cite this Entry
“Untreated.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/untreated. Accessed 17 Jan. 2026.
Copy CitationMedical Definition
untreated
adjective
un·treat·ed
-ˈtrēt-əd
: not subjected to treatment
an untreated disease
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